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Old 11-30-2008, 12:59 PM   #1
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Using 20.3 CU. box in 2x4 studded walls, ok ?


Have a bunch of these outlet/switch boxs laying around and would like to know if its ok (pre-code) to use them in a interior 2x4 wall ?

Seams like little room on where the romex runs in to mount in a 2x4 wall, but if code says its ok, then its one less thing to buy

Box measures 3-1/4 over all and 2-7/8 from back of box to "sheet-rock stops".

Will be used in NY (if that matters).

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Old 11-30-2008, 02:42 PM   #2
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Using 20.3 CU. box in 2x4 studded walls, ok ?


They should be fine. They are used all the time. However I am not sure as to you local code.

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Old 11-30-2008, 09:19 PM   #3
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Using 20.3 CU. box in 2x4 studded walls, ok ?


I ran into an inspector one time that wanted nail guards on all the deep boxes that I installed because it was less than 1 1/4 inches from the back of the box to the edge of the stud. I reluctantly did it just to get out of there and I didn't plan on working in his juristiction again anyways.
The inspector was wrong, he was referring to running romex in a hole in a stud with less than 1 1/4 inches from the edge.

My point is, what you want to do is code compliant, but I know of one inspector that won't allow it.

You can't always predict what little quirks your AHJ might have.
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Old 11-30-2008, 10:43 PM   #4
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Using 20.3 CU. box in 2x4 studded walls, ok ?


I ONLY use 20+ cu/in 1g boxes for new work. I have never had an issue nor have have I ever heard of this being an issue. At least in my part of NY.
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Old 12-03-2008, 12:33 AM   #5
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Using 20.3 CU. box in 2x4 studded walls, ok ?


Thanks guys.
Theres only like 4 or 6 boxs which need to be in the 2x4 walls, the rest will sit in 2x6.
Being a home owner doing the work - i when out and bought a few 18cu just in case the inspector was having a bad day. Im sure there will be little things i miss or do not know which he might have a problem with, so i figure, better save then sorry with something as simple as a box.

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